Tight control of diabetes matters

22 Dec
2005

We have been preaching tight control of glucose in patients with diabetes for a number of years. We believed that it made a major difference. We were right!

Diabetes Study Verifies Lifesaving Tactic

A 17-year federal study has finally answered one of the most pressing questions about diabetes: Can tight control of blood sugar prevent heart attacks and strokes?

The answer, reported today in The New England Journal of Medicine, is yes. Intense control can reduce the risk by nearly half.

And, the study found, the effect occurred even though the patients had only had a relatively brief period of intense blood sugar control when they were young adults. Nonetheless, more than a decade later, when they reached middle age, when heart disease and strokes normally start to appear, they were protected.

The study involved those with Type 1 diabetes, which usually arises in early in life and involves the death of insulin-secreting cells.

“This is truly an important study,” said Dr. Robert Rizza, a professor of medicine at the Mayo Clinic and the president of the American Diabetes Association. “And I usually don’t say that,” he added.

One could argue that we only know that this is true for type I diabetes, and thus we do not have the evidence to push as hard with type II diabetes. That reasoning is (in my opinion) flawed. (see previous rant)

But the result also gives rise to questions: Does the same effect occur in people with Type 2 diabetes, which usually occurs later in life and involves an inability to respond to insulin? And why would tight control of blood sugar for one brief period have such a pronounced effect later?

Dr. Fradkin said she expected that the results would hold for Type 2 diabetes. Another large federal study is addressing that question, she noted, but it is already known that tight control of blood sugar in Type 2 diabetes protects against nerve, kidney and eye damage, just as it does with Type 1 diabetes.

In addition, a study in Britain hinted, though it did not demonstrate, that Type 2 diabetics who kept their blood sugar low had less heart disease and fewer strokes.

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Related posts:

  1. When is tight control too tight
  2. Long term benefits of tight control in diabetes
  3. A good article on Type II Diabetes Mellitus
  4. ICU tight control – not necessary
  5. Screening for ‘pre-diabetes’

Related posts brought to you by Yet Another Related Posts Plugin.

3 Responses to Tight control of diabetes matters

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Roy M. Poses MD

December 22nd, 2005 at 2:30 pm

As best as I can tell, the article includes no data about survival rates in each group, and no data about possible adverse effects of tight control (e.g., hypoglycemic events and their consequences) at all.
If one assumes that the decreasing numbers in the groups from the start of the trial to year 11 found in Table 1 represent losses due to mortality, there appears to be no survival advantage from tight control. Given that there were fewer cardiac events in the tight control group, lack of survival advantage may be due to fatal hypoglycemic events in that group.
As I recall, the original DCCT trial showed a marked increase in hypoglycemic events in the tight control group, and thus it was not clear that the trade-off of less microvascular events due to tight control for more hypoglycemic events was favorable to patients.
In the absence of data about total mortality or about hypoglycemic events, this study does not convincingly argue for tight control as the best alternative for patients.

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antifaust » Blog Archive » Medlinks for 2005-12-28

December 28th, 2005 at 5:14 am

[...] Tight Control of Diabetes Matters DB’s Medical Rants: Study confirms benefits of tight glucose control in Type I Diabetes. A study concerning Type 2 Diabetes is ongoing. A reader, however, comments on the risks of hypoglycemia. (tags: issues diabetes) [...]

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Anne Guglik, NREMT-P

December 29th, 2005 at 11:33 am

Would you rather have a patient who has early-stage neuropathy at age 30, like my sister, who believed her (first, and fortunately not present) endocrinologist instead of me (after all, I’m just a nosy paramedic who loves her) and allowed glucose levels in the low 200’s for the first few years after diagnosis (at age 17)?

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